如何通过kissxml解析器解析xml的子节点值？

Question

我有这样的XML文件：现在

<Menu> 
<item value="boiled"> 
    <image value="boiling1recipe">boiling1.jpg</image> 
    <recipeImage>png1.png</recipeImage> 
    <recipeImage>png2.png</recipeImage> 
    <recipeImage>png3.png</recipeImage> 
    <recipeImage>png4.png</recipeImage> 
    </item> 
    <item value="boiled"> 
    <image value="boiling2recipe">boiling2.jpeg</image> 
    <recipeImage>png5.png</recipeImage> 
    <recipeImage>png6.png</recipeImage> 
    <recipeImage>png7.png</recipeImage> 
    <recipeImage>png8.png</recipeImage> 
    </item> 
    <item value="rosted"> 
    <image value="roasted1recipe">roasted1.jpeg</image> 
    <recipeImage>png8.png</recipeImage> 
    <recipeImage>png9.png</recipeImage> 
    <recipeImage>png10.png</recipeImage> 
    <recipeImage>png11.png</recipeImage> 
    </item> 
    <item value="rosted"> 
    <image value="roasted2recipe">roasted2.jpeg</image> 
    <recipeImage>png12.png</recipeImage> 
    <recipeImage>png13.png</recipeImage> 
    <recipeImage>png1.png</recipeImage> 
    <recipeImage>png2.png</recipeImage> 
    </item> 
</Menu> 

， 我解析它像这样：

DDXMLNode *node = [item attributeForName:@"value"]; 

    if ([[node stringValue] isEqual:@"boiled"]) { 
     [listOfBoiledItems addObject:model]; 

     DDXMLNode *node1 = [item attributeForName:@"value"]; 

     if ([[node1 stringValue] isEqual:@"boiling1recipe"]) { 
      [listOfRecipies1 addObject:model]; 
     } 
     else if ([[node1 stringValue] isEqual:@"boiling2recipe"]) { 
      [listOfRecipies2 addObject:model]; 
     } 
    } 
      else if ([[node stringValue] isEqual:@"rosted"]) { 
     [listOfRostedItems addObject:model]; 

     DDXMLNode *node1 = [item attributeForName:@"value"]; 

     if ([[node1 stringValue] isEqual:@"roasted1recipe"]) { 
      [listOfRecipies6 addObject:model]; 
     } 
     else if ([[node1 stringValue] isEqual:@"roasted2recipe"]) { 
      [listOfRecipies7 addObject:model]; 
     } 
    } 

这里， 编译器读取父节点值即“煮”和“rosted”，而不是读取智利节点值，即“沸腾1调配”，“沸腾2调配”，“烘烤1调配”和“烘烤2调配”。 什么可能是问题，意味着我做错了什么？ 请指导我第一次做解析。

Answer 1

为什么不用XPath查询呢？这会更容易，你可以解析循环中的每一个项目。 我没有尝试在你的XML的代码，但它应该工作：

NSError *error; 
NSArray *xmlItems = [ddDoc nodesForXPath:@"//item" error:&error]; // where ddDoc is your DDXMLDocument 

for(DDXMLElement* itemElement in xmlItems) 
{ 
    // Here you get the item->value attribute value as string... 
    NSString *itemValueAsString = [[itemElement attributeForName:@"value"]stringValue]; 

    // Now you get the image element from inside the item element 
    DDXMLElement *imageElement = [[itemElement nodesForXPath:@"image" error:&error] objectAtIndex:0]; 

    // And finally the image->value attribute value as string… 
    NSString *imageValueAsString = [[imageElement attributeForName:@"value"]stringValue]; 
} 

希望它可以解决您的问题。